EXPLANATION" OF THE PLATES. 



Vll 



PLATE XII. 



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Fig. 



O 



Fig. 



8. 



Fig. 



4. 



Fig. 



5. 



Figs. 1-21. Clidaates propython, Cope, from Unioutown, Alabama; one-half the natural size. 



Fig. 1. Cranium from above. 

 The same from below. 

 Profile of same, with under jaw. 

 Left quadrate bone external face ; natural size. 

 Axis, anterior view, showing odontoid process ; natural size. 



Fig. 0. The same, posterior view. 



Fig. 7. Three cervical vertebra) from below; the 8d, 4th, and 5th. 



Fig. 8. The 9th, 10th, and 11th vertebra (dorsals), from above, displaying glenoid cavity and adjacent parts of 

 coraeoid bone, adherent on tbe inferior face. 



Fig. 9. Anterior view of the 9th vertebra (from cranium). 



Fig. 10. Inferior view of 18th, 19th, and 20th vertebra. 



Fig. 11. Anterior caudal vertebra, from right side. 



Fig. 12. Posterior caudals. 



Fig. 18. Anterior view of a caudal vertebra from a position in advance of those represented in lig. 11. 



Fig. 14. More distal caudals. 



Fig. 15. Terminal caudals. 



Fig. 16. Coraeoid and part of scapula of left side. 



Fig. 17. Humerus, Ulna, Radius, and first row of carpal bones. (The latter were dislocated by the artist and 

 not accurately replaced by him ; thus the interosseous margins of the outer and middle oarpals should be continuous, 

 &o ) Natural size. 



Fig. 18. Distal extremity of humerus. 



Fig. 19. Proximal extremity of humerus. 



Fig. 20. Right humerus anterior (exterior) face. 



Fig. 21. Carpal bono natural size. 



Figs. 22 to 24. Liodon proriyer, Cope, from the cretaceous beds of Kansas. Museum of Comparative Zoology, 



Fig. 22. Muzzle from above, anterior to the middle of the prefrontal bone ; one-fourth natural size 



Fig. 2?,, Same in profile. 



Fig. 24. First maxillary tooth natural size. 



PLATE XIII. 



Fig. 1 — 9. Megadaetylui polyzelus, Hitchcock, natural size. From the museum of Amherst college. 



Fig. 1. Left Femur, posterior view; la, inferior extremity from behind; lb, superior extremity antero-ex- 

 tcriorly ; lc, inferior extremity from before ; Id, same, cxtremital view. 



Fig. 2. Fibula ; proximal end at top, distal end at bottom of plate, middle of shaft lost. 



Fig. 8. Tibia, proximal end external view ; 8a, same, cxtremital view. 



Fig. 4. Fibula and proximal part of foot, from the outer side ; 4a, cuboid bone ; 4b, metatarsal. 



Fig. 5. A dorso-lumbar vertebral centrum from below ; fig, 6a, proximal caudal from above showing the lower 

 margin of the latteral foramen. 



Fig. 7. Two oaudal vertebra;, the anterior injured, and with a portion of a chevron bone. 



Fig. 8. A distal caudal vertebra, side view. 



Fig. 9. Right anterior foot. 



